<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>跳转</title>
</head>
<body>
    <div id="timer"></div>
</body>
<script>
    /**
     *在timer中显示倒计时10秒钟 
     * 时间到时，转跳到网页
     */
    var timer = document.getElementById("timer");
    var count= 10;
    var intervalId = setInterval(function(){
        
        timer.innerHTML = count +"秒后跳转";
        count = count -1
        if(count == 0){
            clearInterval(intervalId);
            window.location.href="http://www.baidu.com"
        }
    },1000)
</script>
</html>